the allele that is expressed, regardless of the other allele
the allele that is expressed only if there is no dominant allele present
having different alleles for a particular gene
having two identical alleles for a particular gene
: the actual genetic makeup (for example: FF, Ff, or ff)
the observable physical traits (for example: purple flower color
recessive inherited disease like cystic fibrosis.
Heterozygous parents are carriers of the disease-causing allele
dominant inherited disease
One dominant allele is needed to show disease
Dominant lethal alleles are usually eliminated from the population
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